From 47d0e69b46cb293567efbe3b8a595e1d83529719 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 21 Jul 2020 15:01:33 +1000
Subject: [PATCH] signal: treat function-ref signals as if they were
 std::function

---
 signal.hpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/signal.hpp b/signal.hpp
index 7dbe49c7..ea2375aa 100644
--- a/signal.hpp
+++ b/signal.hpp
@@ -189,6 +189,17 @@ namespace cruft {
     };
 
 
+    //-------------------------------------------------------------------------
+    // Function references are _actually_ used as if they are std::function
+    // objects in our libraries.
+    //
+    // TODO: avoid this implicit conversion without need a massive rewrite.
+    template <typename ReturnT, typename ...ArgsT>
+    class signal<ReturnT(ArgsT...)> :
+        public signal<std::function<ReturnT(ArgsT...)>>
+    { };
+
+
     ///////////////////////////////////////////////////////////////////////////
     // wrap a value in a signal and trigger on assignment
     //template <typename T, template <typename> class ReductionT>